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Use willReadFrequently in 2D canvas contexts

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Updated all calls to getContext('2d') to include the { willReadFrequently: true } option. This change improves performance for frequent pixel read operations, particularly for mask and image processing tasks.
This commit is contained in:
Dariusz L
2025-07-01 07:44:14 +02:00
parent cf10322101
commit 02bac6c624
5 changed files with 23 additions and 23 deletions
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12
js/CanvasIO.js
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@@ -102,7 +102,7 @@ export class CanvasIO {
const tempMaskCanvas = document.createElement('canvas');
tempMaskCanvas.width = this.canvas.width;
tempMaskCanvas.height = this.canvas.height;
const tempMaskCtx = tempMaskCanvas.getContext('2d');
const tempMaskCtx = tempMaskCanvas.getContext('2d', { willReadFrequently: true });
tempMaskCtx.clearRect(0, 0, tempMaskCanvas.width, tempMaskCanvas.height);
@@ -279,7 +279,7 @@ export class CanvasIO {
const tempMaskCanvas = document.createElement('canvas');
tempMaskCanvas.width = this.canvas.width;
tempMaskCanvas.height = this.canvas.height;
const tempMaskCtx = tempMaskCanvas.getContext('2d');
const tempMaskCtx = tempMaskCanvas.getContext('2d', { willReadFrequently: true });
tempMaskCtx.clearRect(0, 0, tempMaskCanvas.width, tempMaskCanvas.height);
@@ -403,7 +403,7 @@ export class CanvasIO {
}
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
const ctx = canvas.getContext('2d', { willReadFrequently: true });
canvas.width = tensor.width;
canvas.height = tensor.height;
@@ -611,7 +611,7 @@ export class CanvasIO {
const canvas = document.createElement('canvas');
canvas.width = imageData.width;
canvas.height = imageData.height;
const ctx = canvas.getContext('2d');
const ctx = canvas.getContext('2d', { willReadFrequently: true });
ctx.putImageData(imageData, 0, 0);
const img = new Image();
@@ -684,7 +684,7 @@ export class CanvasIO {
const tempCanvas = document.createElement('canvas');
tempCanvas.width = img.width;
tempCanvas.height = img.height;
const tempCtx = tempCanvas.getContext('2d');
const tempCtx = tempCanvas.getContext('2d', { willReadFrequently: true });
tempCtx.drawImage(img, 0, 0);
@@ -693,7 +693,7 @@ export class CanvasIO {
const maskCanvas = document.createElement('canvas');
maskCanvas.width = img.width;
maskCanvas.height = img.height;
const maskCtx = maskCanvas.getContext('2d');
const maskCtx = maskCanvas.getContext('2d', { willReadFrequently: true });
maskCtx.drawImage(mask, 0, 0);
const maskData = maskCtx.getImageData(0, 0, img.width, img.height);